AltitudeBot/src/main/java/com/alttd/database/queries/QueriesStaffJoinDate.java

package com.alttd.database.queries;

import com.alttd.DTO.JoinDate;
import com.alttd.database.Database;

import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.time.Instant;
import java.util.ArrayList;
import java.util.List;
import java.util.Optional;

public class QueriesStaffJoinDate {

    public static Optional<JoinDate> getJoinDate(long userId) {
        String sql = "SELECT date FROM staff_join_date WHERE user_id = ?";
        try (PreparedStatement preparedStatement = Database.getDatabase().getConnection().prepareStatement(sql)) {
            preparedStatement.setLong(1, userId);

            ResultSet resultSet = preparedStatement.executeQuery();
            if (!resultSet.next())
                return Optional.empty();

            Instant date = Instant.ofEpochMilli(resultSet.getLong("date"));
            if (date == null) {
                return Optional.empty();
            }
            return Optional.of(new JoinDate(userId, date));
        } catch (SQLException exception) {
            exception.printStackTrace();
            return Optional.empty();
        }
    }

    public static void setJoinDate(long userId, Instant date) {
        String sql = "INSERT INTO staff_join_date (user_id, date) VALUES (?, ?) ON DUPLICATE KEY UPDATE date = VALUES(date)";

        try (PreparedStatement preparedStatement = Database.getDatabase().getConnection().prepareStatement(sql)) {
            preparedStatement.setLong(1, userId);
            preparedStatement.setLong(2, date.toEpochMilli());
            preparedStatement.executeUpdate();
        } catch (SQLException e) {
            throw new RuntimeException(e);
        }
    }

    public static List<JoinDate> getAllJoinDates() {
        String sql = "SELECT * FROM staff_join_date";
        try (PreparedStatement preparedStatement = Database.getDatabase().getConnection().prepareStatement(sql)) {

            ResultSet resultSet = preparedStatement.executeQuery();
            List<JoinDate> joinDates = new ArrayList<>();
            while (resultSet.next())
                joinDates.add(new JoinDate(resultSet.getLong("user_id"), Instant.ofEpochMilli(resultSet.getLong("date"))));

            return joinDates;
        } catch (SQLException exception) {
            exception.printStackTrace();
            return null;
        }
    }

}